Opinions and Questions on my 383 build

[z383z]

I have looked all over hybridz for answers and have read alot of valuable information on the subject but I would be really intrested in some opinions on my build.

my new 383 that I put in my z consists of

 

forged Eagle Crank

Forged eagle 6inch H-beam rods

Srp 9.8:1 pistons

 

Block zero decked for a better quench area

 

Total Engine airflow

205cc intake 64cc chambers

(based off the trick flow casting)

flow 290cfm at .550 and 296 at .600

 

Comp cams pro magnum 1.6 ratio rockers

 

Performer rpm air gap manifold port matched to heads.

 

Demon 650 carb

 

cam comp cam#12-433-8

http://store.summitracing.com/partdetail.asp?part=CCA%2D12%2D433%2D8&autoview=sku

 

csr electric water pump

 

Hamburger drag race oil pan with crank scraper and windage screen.

 

ends up at 9.9:1 compression about

 

I was pretty much trying to follow the afr build with their 195 eliminator heads

http://airflowresearch.com/chevy_dyno.php

But use TEA's better flowing heads

 

I am trying to figure out how restrictive if at all would headers with a 1 5/8 primary and 3 inch collectors be on this engine, as well as any other opinions on things that I could improve.

 

Thanks in advance

 

p.s. happy haloween

 

 

mike

[jt1]

Looks like a nice combo for a street/strip engine. You will probably want a little more carb, at least a 750 or maybe a 830. 1 3/4 long tubes will make more power, but the 1 5/8block huggers aren't a huge restriction.

 

 

How are you planning to use the engine, and what kind of gas are you going to run?

 

jt

[z383z]

I built the car to be a fun car to drive on the weekends and on short trips around town. I will also be taking it to the drag strip a few times a month after I get the q45 and tko 500 swaps finished. I'm planning to run it on 91. Also in the distant future I am planning to hook up a port injection nitrous system.

 

 

 

 

Looks like a nice combo for a street/strip engine. You will probably want a little more carb, at least a 750 or maybe a 830. 1 3/4 long tubes will make more power, but the 1 5/8block huggers aren't a huge restriction.

 

 

How are you planning to use the engine, and what kind of gas are you going to run?

 

jt

[dr_hunt]

1-5/8" headers will cost you some hp. I'm not a fan of them. I say 1 3/4" min.

[grumpyvette]

the combo looks sound, and well thought thru, the only potential areas of concern is that

(1)you didn,t list the drive train, that combo will work best with a manual trans and a 4.11 or 4.33:1 rear gear ratio, or an auto with a 3000-3200rpm stall converter

(2)dr hunts correct the 1 5/8" headers may cost a few peak hp ,(especially if you run nitrous later on) but youll gain some low to mid rpm N/A torque as a trade off, so its your choice, not a big deal either way, in my opinion on a street driven car.

(3) but Id suggest you install a full length 3" exhaust with an (X) or (H) connector as the combo will be restricted if you use anything smaller

(4) the cars rear suspension and rear differential, TIRES should be carefully set up to handle the torque, PROBABLY requires a few rear wheel tub and roll cage mods

(5) Id suggest a 750-800 demon or HOLLEY carb also, the smaller carb will work, but your likely to be down a couple hp, again,not a big deal either way, in my opinion on a street driven car.

(6)you didn,t mention the RINGS and BEARINGS Id use (H) type bearings and be sure to check with the manufacturer on the correct ring gap and bore finnish for honeing and use a torque plate while its honed, and get the piston to bore clearance correct, use a good assembly lube

 

http://store.summitracing.com/partdetail.asp?part=CLE%2DMS909H&autoview=sku

GROUVE IN BLOCK NOT CAPS ON THE MAINS (check thrust bearing clearance)

 

http://store.summitracing.com/partdetail.asp?part=CLE%2DCB663HN10&autoview=sku

 

 

 

BTW IF YOU DO INSTALL A NITROUS KIT

 

ID use this intake/kit Ive had great results with the combo

 

http://www.holley.com/300-110.asp

 

http://www.holley.com/02101NOS.asp

[z383z]

I was debating switching to a Holley or Wilson single plan intake manifold but I didn't want to lose any of my torque down low, on the other hand in a car as light as a Z it probably wouldn't be much of a problem either way.

 

Also the carb that I was thinking about upgrading to was the proform PRO-67200 http://store.summitracing.com/partdetail.asp?autofilter=1&part=PRO%2D67200&N=700+400405+306076+115&autoview=sku

 

 

Is their a general rule of thumb regarding fuel gph that I should be running. The fuel pump I upgraded to is the Areomotive AEI-11203 I am not set on running it if their are any objections to it.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=AEI%2D11203&N=700+115&autoview=sku

 

 

And to answer Grumpyvette's questions

 

(1) I am planning on running a 5 speed specifically a tko500 (http://www.ddperformance.com/Tremec%20trans.htm)

 

As for the rear end I am almost finished with the q45 swap for now which has 3.56 gears(correct me if I am wrong) and for tires I will be running some Mickey Thompson ET streets.(top)

http://www.mickeythompsontires.com/strip.php?item=ETStreetRadial

 

In the not so distant future I will be installing a for 9 inch with a 4 link and a full cage with sub frame connectors to stiffen up the body. After that I will be able to play around with rear gears more.

 

(2) If they aren't too restrictive I may run some 1 5/8 long tubes due to fitment issues until I decide to make new engine mounts so I can fit 1 3/4 long tubes.

 

 

(3) I was planning on running a 3 to 3 1/2 inch Y exhaust but if that wont be as efficient I will try and figure out how to change my current set up to allow for an X.

 

(4) Answered in number 1

 

(5) again answered earlier Proform 750?

 

(6) I had the Clevite 77 high performance H series performance rod and main bearing set installed about 6 months ago by in my opinion the best machine shop in the area. It was long enough ago that I don't remember exactly what they did when assembling the short block. I do however trust them and from past experiences and things I have heard and am not worried about their quality of work.

 

Thank you for all of the help.

 

mike

[grumpyvette]

you look like youve got things reasonably well under control,

please keep us up on your progress.

 

the fuel pump should be fine provided the correct return style feul pressure regulator and fuel lines are run, Id suggest a 1/2" on both the feed and return lines if you can and a fuel cell rather than the stock lines and tank.

 

BITS OF INFO HERE

 

http://www.digitalcorvettes.com/forums/showthread.php?t=81648

"

(3) "I was planning on running a 3 to 3 1/2 inch Y exhaust but if that wont be as efficient I will try and figure out how to change my current set up to allow for an X."

 

the dual 3" should be fine on the exhaust, and the 3" to a (Y) too a 3.5" should also work reasonably well, in fact it MIGHT give a bit of extra mid rpm tq and I doubt it will hurt the upper rpms all that much as it will tend to keep the scavaging pulse strength higher/longer if its done correctly, keeping in mind exhaust flows in pulses not constant flow, and the exhaust voluum has cooled and gotten smaller further from the headers collectors,

BTW the BETTER dual plane intakes usually out perform the single plane intakes untill about 6000rpm, and a hydrolic roller cam generally starts to fade by 6500rpm, the single plane intake I suggested works great with NITRIOUs due to distribution advantages with nitrous ,but Id stick with the dual plane on a N/A combo

[rsicard]

I was debating switching to a Holley or Wilson single plan intake manifold but I didn't want to lose any of my torque down low, on the other hand in a car as light as a Z it probably wouldn't be much of a problem either way.

 

Also the carb that I was thinking about upgrading to was the proform PRO-67200 http://store.summitracing.com/partdetail.asp?autofilter=1&part=PRO%2D67200&N=700+400405+306076+115&autoview=sku

 

 

Is their a general rule of thumb regarding fuel gph that I should be running. The fuel pump I upgraded to is the Areomotive AEI-11203 I am not set on running it if their are any objections to it.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=AEI%2D11203&N=700+115&autoview=sku

 

 

And to answer Grumpyvette's questions

 

(1) I am planning on running a 5 speed specifically a tko500 (http://www.ddperformance.com/Tremec%20trans.htm)

 

As for the rear end I am almost finished with the q45 swap for now which has 3.56 gears(correct me if I am wrong) and for tires I will be running some Mickey Thompson ET streets.(top)

http://www.mickeythompsontires.com/strip.php?item=ETStreetRadial

 

In the not so distant future I will be installing a for 9 inch with a 4 link and a full cage with sub frame connectors to stiffen up the body. After that I will be able to play around with rear gears more.

 

(2) If they aren't too restrictive I may run some 1 5/8 long tubes due to fitment issues until I decide to make new engine mounts so I can fit 1 3/4 long tubes.

 

 

(3) I was planning on running a 3 to 3 1/2 inch Y exhaust but if that wont be as efficient I will try and figure out how to change my current set up to allow for an X.

 

(4) Answered in number 1

 

(5) again answered earlier Proform 750?

 

(6) I had the Clevite 77 high performance H series performance rod and main bearing set installed about 6 months ago by in my opinion the best machine shop in the area. It was long enough ago that I don't remember exactly what they did when assembling the short block. I do however trust them and from past experiences and things I have heard and am not worried about their quality of work.

 

Thank you for all of the help.

 

mike

 

Mike:

 

Check recent issues of Popular HotRodding. David Vizard has his student build up a 383 with Dart Platinum Pro 1 Cylinder Heads. Look specifically at the camshaft specs and pictures of the ports on the Cylinder Heads. Mondello constructed the flow bench for Dart and they also used new techniques as good or better than CFD used by Detroit to design port flow. The 383 yielded 500HP and 500 ft Lbs of Torque on the Dyno. All the remainder of your choices are very good.

 

RJS